REACTION MECHANISM OF ONE-POT SYNTHESIS OF POLYCYCLIC QUINONES —DIRECT EVIDENCE OF PHOTO-INDUCED ELECTRON TRANSFER PROCESS
作者:Kazuhiro Maruyama、Seiji Tai、Tetsuo Otsuki
DOI:10.1246/cl.1983.843
日期:1983.6.5
4-naphthoquinone (substituents; halogen atom or methoxy group) with 1,1-diarylethylene provides us a powerful one-pot synthetic method of polycyclic quinones. Involvement of electrontransfer process in the photochemical reaction was evidenced unambiguously by means of CIDNP technique.
In spite of large steric repulsion betweenaromaticquinone moiety and dicyanomethylene moiety the title compounds (BDCNBA) were synthesized by TiCl4-catalyzed reactions of the corresponding aromaticquinones and malononitrile. BDCNBA showed electronic spectra indicating the intramolecular charge-transferinteraction and redox properties similar to 11,11,12,12-tetracyano-9,10-anthraquinodimethane (TCNAQ)